Lock



Patented Aug. 23, 1938 UNITED STATES v LooK v Robert T; Burgess, Holden,5 v .Application February 17, l938 Seria1'1o; l9.1; (l5 1 I I Q IClaim.(01. 70911 r g l1 has alateral offset l9 and an arcuately turned K Myinvention relates to improvements in looks, and the main object is toprovide a simple and positive lock particularly suitable for outdoor useon doors, gates and other places where a conventional hasp and staplewould be used.

Another object is to provide a lock of this kind wherein the lockhousing takes the form of the hasp, being pivotally mounted at one endto the door or frame and, having a slot at its other end to engage thestaple, and the locking being carried out by a pivoted lock bar adaptedto swing through the staple crosswise to the slot and so secure the haspto the staple.

A further object is to provide a lock of this kind wherein a doublelocking feature is provided by means of a slidable latchbar adapted toengage the aforesaid lock bar in its staple engaging position and toprevent the lock bar from swinging out of the staple until both bars arereleased by a key inserted in the lock itself.

The foregoing and other more specific objects and advantages of myinvention will be made evidentin the course of the following detailedspecification, reference being had to the accompanying drawing whereinFigure 1 is an elevation of my improved look as mounted on a door andframe, only a portion of the door and frame being shown, and the coverplate of the lock being removed to disclose the internal construction.

Figure 2 is a similar view of the lock alone, the lock bar andassociated parts being shown in unlocked positions.

Figure 3 is a cross section along the line 33 in Figure 1. v

Figure 4 is a cross section along the line 4-4 in Figure 2.

In carrying out my invention, I provide the member 5 made in the shapeof a hasp in elongated narrow form having an eye 6 at one end by whichit may be fastened to a ring or staple A in the door B and having alongitudinally extended slot 1 in the other end adapted to receive'thestaple C fastened to the door frame D. Between these ends of the haspmember 5 a rectangular lock housing 8 is formed and comprises thefrontal end 9, sides In and H and rear end l2 adapted to be covered by aremovable flat cover plate l3 held in place by screws or rivets l4.

The frontal end 9 of the housing 8 is parted medially and provided witharcuate wings l5 forming a socket in which the rounded hub N5 of thelock bar I1 is pivotally mounted and wherein it is secured by a pivotpin I8 extended through the housing and cover l3. This lock bar lockhook which is adapted to swing through the staple C when the lock bar ispivoted 0n the pin l8 across the face of the slotted end of the haspmember as shown in Figure 1. The lock bar and its hook are concealed inthe locked position by means of the sinuous channel-shaped enclosures 2|formed on the hasp member and opening at one side to receive the bar andhook as shown.

At its inner end the lock bar I! has the short extended lock arm 22 andbetween this arm and the lower side ll of the housing 8 an expansioncoil spring 23 is braced and arranged to normally swing the latch bar onthe pin [8 and cause the hook 20 to swing out of engagement with thestaple C. This movement is limited by engagement of the arm 22 with oneof the wings l5 as shown in Figure 2.

A lock block 24 is slidably mounted in the upper portion of the housing8 and is normally urged forwardly therein toward the end 9 by anexpansion coil spring 25 braced between the opposite housing end l2 andan extension 26 of the block. The frontal corner portion 21 of the block24 is thus adapted to overlie the arm 22 and hold the lock bar IT in itslocked position (Figure 1) but by inserting a key 28 through the keyhole 29 in the cover I3 and engaging it with the recess 30 the block maybe urged rearwardly so as to clear the arm 22 and allow the bar ll toclear the staple C (Figure 2). Then to lock the bar with the stapleagain the bar is swung by hand into this position whereupon the spring25 moves the block 24 forwardly again holding the bar in lockedposition. The block 24 may be slotted in its rear portion at 3| toreceive an index plate 32 secured to the rear upper corner of thehousing 8 and the key 28 provided with a notch 33 to clear this plate sothat in unlocked position the key cannot be removed from the lock.

To further lock the bar I! in its staple engaging position, I provide alatch bar 34 of flat elongated form and which has its straight shankportion 35 slidably mounted lengthwise along the hasp member 5 in agroove 36formed therein. At its frontal end the latch bar 34 is forkedto provide spaced parallel fingers 31 for the slidable reception ofwhich branches 36a of the groove 36 are provided. The rear end of thebar 34 is attached by a pin or rivet 38 to the lock block 24 and theaforesaid sliding movement of this block of course causes acorresponding motion of the latch bar. The pin l8 supporting the lockbar l-l passes through a slot 39 in the latch bar which slot providesfor the necessary motion of the latch bar as will be understood.

In the forward or locked position of the block 24, the latch bar fingers31 project across the path of the lock bar hook 20 and this hook hasspaced notches 40 in its inner or under side which receive thesefingers. As a result the hook is positively locked against swinging outof locking engagement with the staples since to do so would requireshearing the fingers oif to clear. However, as the lock block 24 ismoved back by the key in unlocking the lock, the latch bar is moved insuch manner that the fingers 31 withdraw from the notches 40 and freethe latch hook 20 as will be understood.

It will thus be understood that I have provided a lock having a doublelocking feature and which may be adapted to a wide variety of uses. Thelock of course may be made in any size desired.

While I have herein set forth a certain preferred embodiment of myinvention, it is understood that I may vary from the same in minorstructural details, so as best to provide a practical device for thepurposes intended, not departing from the spirit of the invention andwithin the scope of the appended claim.

I claim:

In a look, a hasp member having a staple receiving slot, a lock barpivoted at one end on the hasp member, a hook extended from the free endof the lock bar and adapted in locked position to swing across the saidstaple receiving slot, an arm extended from the lock bar, a key actuatedlock block adapted normally to engage the said arm and retain the lockbar in locked position, a latch bar slidably mounted on the hasp memberand connected to the lock block, and the other end of the latch barbeing adapted to engage and secure the hook in the locked position ofthe bar.

' ROBERT T. BURGESS.

